201121170 has 32 divisors (see below), whose sum is σ = 483675840. Its totient is φ = 53522880.

The previous prime is 201121157. The next prime is 201121171. The reversal of 201121170 is 71121102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201121171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8685 + ... + 21855.

It is an arithmetic number, because the mean of its divisors is an integer number (15114870).

Almost surely, 2^201121170 is an apocalyptic number.

201121170 is an abundant number, since it is smaller than the sum of its proper divisors (282554670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201121170 is a wasteful number, since it uses less digits than its factorization.

201121170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13690.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 201121170 is about 14181.7195713355. The cubic root of 201121170 is about 585.8942856591.

Adding to 201121170 its reverse (71121102), we get a palindrome (272242272).

The spelling of 201121170 in words is "two hundred one million, one hundred twenty-one thousand, one hundred seventy".